Measuring OpenMP Performance

• OpenMP constructs need time to execute:

  • parallel region - transfer control to user code
  • barrier - control synchronization of threads
    • covers do/for parallel loops, parallel sections
  • critical section - serialization of threads
    • covers locks
  • reduction operation - update of a shared variable
    • covers atomic

Compiler versions 7.3.1.1m and 7.3.1.2m

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